Verifying The Interface Is Up - Cisco ASR 1000 Configuration Manual

Performing Basic Interface Troubleshooting
To verify that your interface is operating properly, complete the steps in
Table 11-1 Basic Interface Troubleshooting Steps
Action
Step 1 From global configuration mode, enter the
show interfaces gigabitethernet, show
interfaces tengigabitethernet, or show
interfaces fastethernet command.
Step 2 Verify that the interface is up.
Step 3 Verify that the line protocol is up.
Step 4
Observe the CRC counter.
Step 5 Observe the carrier signal counters.
For more information about the verification steps and possible responses to correct detected problems,
see the following sections:
•
•
•
•

Verifying the Interface Is Up

In the output from the show interfaces gigabitethernet, show interfaces tengigabitethernet, or show
interfaces fastethernet command, verify that the interface is up. If the interface is down, perform the
following corrective actions:
•
•
•
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
11-4
Verifying the Interface Is Up, page 11-4
Verifying the Line Protocol Is Up, page 11-5
Verifying the CRC Counter, page 11-5
Verifying the Carrier Signal, page 11-5
If the interface is administratively down, use the no shutdown interface configuration command to
enable the interface.
Be sure that the cable is fully connected.
Verify that the cable is not bent or damaged. If the cable is bent or damaged, the signal will be
degraded.
Chapter 11
Example
Router# show interfaces gigabitethernet 2/0/1

Router# show interfaces tengigabitethernet 7/0/0
Router# show interfaces fastethernet 3/0/0
Router# show interfaces gigabitethernet 2/0/1
GigabitEthernet2/0/1 is up, line protocol is up
Router# show interfaces tengigabitethernet 7/0/0
TenGigabitEthernet7/0/0 is up, line protocol is up
(connected)
Router# show interfaces fastethernet 3/0/0
FastEthernet3/0/0 is up, line protocol is up
Router# show interfaces gigabitethernet 2/0/1
GigabitEthernet2/0/1 is up, line protocol is up
Router# show interfaces tengigabitethernet 7/0/0
TenGigabitEthernet7/0/0 is up, line protocol is up
(connected)
Router# show interfaces fastethernet 3/0/0
FastEthernet3/0/0 is up, line protocol is up
0 input errors, 0 CRC, 0 frame, 130043940 overrun, 0
ignored
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
Troubleshooting the Gigabit Ethernet SPAs
Table 11-1:
OL-14127-08